FreeBSD web build failed on build-web.stream.freebsd.org

[User Www-data]

              ^
/home/www/build/head/en_US.ISO8859-1/books/handbook/linuxemu/chapter.xml:581: parser error : Double hyphen within comment: <!--
  As of October 2013, the trial version is only a
   ----- snip ------------</programlisting></step>
                ^
/home/www/build/head/en_US.ISO8859-1/books/handbook/linuxemu/chapter.xml:581: parser error : Double hyphen within comment: <!--
  As of October 2013, the trial version is only a
   ----- snip ------------</programlisting></step>
                  ^
/home/www/build/head/en_US.ISO8859-1/books/handbook/linuxemu/chapter.xml:581: parser error : Double hyphen within comment: <!--
  As of October 2013, the trial version is only a
   ----- snip ------------</programlisting></step>
                    ^
/home/www/build/head/en_US.ISO8859-1/books/handbook/linuxemu/chapter.xml:581: parser error : Double hyphen within comment: <!--
  As of October 2013, the trial version is only a
   ----- snip ------------</programlisting></step>
                      ^
/home/www/build/head/en_US.ISO8859-1/books/handbook/linuxemu/chapter.xml:581: parser error : Double hyphen within comment: <!--
  As of October 2013, the trial version is only a
   ----- snip ------------</programlisting></step>
                        ^
/home/www/build/head/en_US.ISO8859-1/books/handbook/linuxemu/chapter.xml:630: parser error : Double hyphen within comment: <!--
  As of October 2013, the trial version is only a
      <!--
        ^
/home/www/build/head/en_US.ISO8859-1/books/handbook/linuxemu/chapter.xml:1250: parser error : chunk is not well balanced

^
/home/www/build/head/en_US.ISO8859-1/books/handbook/book.xml:207: parser error : Failure to process entity chap.linuxemu
    &chap.linuxemu;
                   ^
/home/www/build/head/en_US.ISO8859-1/books/handbook/book.xml:207: parser error : Entity 'chap.linuxemu' not defined
    &chap.linuxemu;
                   ^
*** [book.parsed.xml] Error code 1

Stop in /home/www/build/head/en_US.ISO8859-1/books/handbook.
*** [all] Error code 1

Stop in /home/www/build/head/en_US.ISO8859-1/books.
*** [all] Error code 1

Stop in /home/www/build/head/en_US.ISO8859-1.
*** [all-all] Error code 1

Stop in /home/www/build/head/en_US.ISO8859-1/htdocs/doc.
*** [all] Error code 1

Stop in /home/www/build/head/en_US.ISO8859-1/htdocs.
        7.80 real         4.15 user         4.00 sys